|
| |
|
|
A056442
|
|
Number of primitive (period n) step cyclic shifted sequence structures using a maximum of five different symbols.
|
|
2
| |
|
|
1, 1, 2, 5, 7, 32, 34, 194, 390, 2361, 3970, 46053, 66674, 613403, 2139340, 10016638, 23424252, 294722828, 465082930, 4972759447, 15773188776, 90323059973, 196342666486, 2587522616960, 4967200045389, 39800811833713
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,3
|
|
|
COMMENTS
| See A056371 for an explanation of step shifts. Under step cyclic shifts, abcde, bdace, bcdea, cdeab and daceb etc. are equivalent. Permuting the symbols will not change the structure.
|
|
|
REFERENCES
| M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.
|
|
|
FORMULA
| sum mu(d)*A056432(n/d) where d|n.
|
|
|
CROSSREFS
| Cf. A056422.
Sequence in context: A174288 A118786 A083777 * A056443 A042931 A085394
Adjacent sequences: A056439 A056440 A056441 * A056443 A056444 A056445
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
|
| |
|
|
